Furnace



.D. J. McNERNEY.

FURNACE- APPLICATION FILED MAR. 22- I92!- Patented Sept. 5, 1922.

3 SMEETS-SHEET I.

Adm-$16 15 ATIORNEY Is -Q its) Dennis J. rrcnnnnnr, or nonrrinnn 1 onnooiv.

FURNACE.

To all whom it may concern a Be it known thatvl, Belarus '5 Moilnnnnv, a citizenof: the United States,residing at Portland, .in the county of D/JllllllHOHlflll and State of Oregon, havelinvented new and useful lmprovementsin Furnacesyof which the following is a specificationu This invention relates to furnaces designed to burn gas, coal orwood, andsto give maximum heat with the consumption of a minimum of fuel.

An important object of the inventionis the provision of a pluralityof units including heating tubes, the units being so-disposed with relation to the fire box'that they arehea-ted by the products of combustion-so as'to intensify the heat of the air admitted to thefurnace, and to insure the obtaining of'the maximum heat with low fuel consumption.

The nature 'andadvantages of the invention will be better understood when the following detail description is read in connection with the accompanyingdrawings, the invention residingin the construction, combination and arrangement of parts as claimed,

In thedrawings forming part of this application like numerals of reference indicate similar parts in the several viewsand where- Figure l is a vertical sectional view" through the device, parts being shown in elevation.

Figure 2 is a sectional view on the line- 2-2 of Figure 1, and s Figure 3 is a sectional view on the line 3 3 of Figure 2. r 1

Referring to the drawings in detail, A in die-atesgenerally'the furnace including frontand rear walls 'lOand 11 respectively which I are connected by the SI('lQ \VtllS 12, the floor line being indicatedat 13;

Arranged within the furnace is the fire usual well .lrnown manner. Secured to the opposedsides of the'fire box and onthe inclined upper edges thereof are angle irons or v the lilte 23 for-' supporting the heating drums or units to be presently described.

These heating drums or units are of identical construction; each comprising a casing 24which is closed at both ends, except for the openings which 1 receive the extremities of the Y heatingtuihes'25 i which are arranged within-the the casing: orheating drums in parallelism with each other as clearly illustratech Thesetubesare indicated at 25 and may vary in number inaccordance' witlr the size of the drum or unit As shown, the open top ofthe fire 'box is closed by two of these units 24ewhich are arranged at an opposite angle or *inclination to each other and supportedby the inclined edges of the fire box upon the-angle irons above referred to. interposedbetweenthelower edges of each unit and' the angle ironsis asbestos packing toiprovide for a fluid tightoint between these parts: The back and sidesoi' the furnace are formed ofinner and outer walls 50 4 and 51' respectively which define'betiveen thenra passage 26 for the inlet of coldair from the room above that in whichx'thelfurnace is located. The low r end of" the inner "wall"50 terminates above the base or foundation forthe furnace sons to permit this cold air to pass to the furnace. I The floor 13 is supposed to indica'te 'thefioor of' theroom' 'above that in which the furnace is locatedand as 1s customary the opening would naturally becov-- I 26 to the furnace.

Positioned between the fire box and the rear wall of the furnace, is another heating unit indicated at 27 and substantially of the same construction as the heating unit above described, comprising a casing which is closed at both ends except for the openings which receive the heating tubes 28 arranged in parallelism within the drum. This drum or unit is however provided with ing the nipple, is also provided with three openings 30 and 30*, preferably arranged in triangular relation. Leading from the uppermost opening 30 projects a smoke pipe 31. provided with a damper 32. Leading from the other tube openings 30 of the set of three above referred to, are branch smoke pipes 34 which are connected with the main smoke pipe 31 by branch pipes 35. In practice, when the fire is started within the fire box, the damper is opened so that the products of combustion pass directly from the fire box through the main smoke pipe, a portion of the products of combustion being however utilized to heat the units or drums 24-. WVhen desired, the damper in the main smoke pipe may be closed, so that the products of combustion entering the easing oi the heating drum or unit 26 is retained therein an appreciable length of time whiie it finds its way to the branch smoke pipes 34-, passing through the latter in the branch pipes 35 and thence to the main smoke pipe atthe opposite side of the damper. In this manner, the tubes of the latter mentioned drum or unit are heated to a. very high degree, as also the units or drums 24; so that the cold air admitted to the furnace through the air ducts is caused to pass through the tubes of all the unit thereby to be intensely heated. The construction of the furnace in its entirety is very simple, while a compactness and ar- -angement of the various parts is such that a comparatively smaller furnace may be produced to afiord approximately three times the heating surface per square foot of the grate area or surface, thus afiording a maximum of heat with. the consumption of a minimum of fuel.

lVhile it is believed that from the foregoing description the nature and advantages of the invention will. be readily apparent, I desire to have it understood that I do not limit myseli' to what is herein shown and described, and that such changes may be resorted to when desired as fall Within the scope of what is clalmed.

What I claim is: 1. A furnace comprising an outer casing,

a fire box including a relatively small casing having an open top, a plurality of heating drums or units closing said top, an additional heating drum or unit arranged at the rear of the lire box and communicating therewith, cold air ducts arranged within the outer casing, a smoke pipe leading from the additional heating drum, and a damper in said pipe.

2. A furnace comprising an outer casing, a fire box including a relatively small casing having an open top, a plurality of heating drums or units closing said top, an additional heating drum or unit arranged at the rear of the fire box and communicating therewith, a smoke pipe leading from the latter mentioned drum or unit, a damper in said pipe, and a plurality of branch smoke pipes leading from the latter mentioned unit and communicating with the main smoke pipe from the rear of said damper.

3. A furnace comprising an outer casing, 22. fire box including a relatively small casing having an open top, a plurality of heating drums or units closing said top, and angularly disposed relatively to each other, and additional heating drum or unit arranged at the rear of the fire box and communicating therewith, each of said drums or units comprising a casing and a plurality of spaced tubes opening at the ends of the casing, a smoke pipe leading from the additional heating drum, a damper in said pipe, and a smoke pipe leading from said drum and communicating with the main smoke pipe at the rear of said damper.

at. A furnace comprising an outer casing, 21 lire hot; including arelatively small casing having an open top and oppositely inclined upper edges, a plurality of heating drums or units supported upon said inclined edges and closing said top, an additional heat ing drum arranged at the rear o1 the fire be and communicating therewith, each of said drums including a casing and spaced parallel. tubes opening at the ends of the casing, a smoke pipe leading from the additional heating drum or unit,'a damper in said pipe, branch smoke pipes leading from said unit and communicating with the main smoke pipe at the rear of said damper, and a cold air duct arranged within the outer casing and terminating below said units.

In testimony whereof I affix my signature.

DENNIS J. MoNERNEY. 

